diff --git a/package.json b/package.json
index 21e632aa45..3e65f7bb85 100644
--- a/package.json
+++ b/package.json
@@ -126,6 +126,7 @@
     "expo-media-library": "~15.9.1",
     "expo-navigation-bar": "~2.8.1",
     "expo-notifications": "~0.27.6",
+    "expo-screen-orientation": "^6.4.1",
     "expo-sharing": "^11.10.0",
     "expo-splash-screen": "~0.26.4",
     "expo-status-bar": "~1.11.1",
diff --git a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.android.tsx b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.android.tsx
index 414f98a611..d9c5ef40b3 100644
--- a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.android.tsx
+++ b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.android.tsx
@@ -1,30 +1,29 @@
-import React, {useState} from 'react'
-
-import {ActivityIndicator, Dimensions, StyleSheet} from 'react-native'
-import {Image} from 'expo-image'
+import React, {useMemo, useState} from 'react'
+import {ActivityIndicator, StyleSheet, useWindowDimensions} from 'react-native'
+import {Gesture, GestureDetector} from 'react-native-gesture-handler'
 import Animated, {
   runOnJS,
+  useAnimatedReaction,
   useAnimatedRef,
   useAnimatedStyle,
-  useAnimatedReaction,
   useSharedValue,
   withDecay,
   withSpring,
 } from 'react-native-reanimated'
-import {GestureDetector, Gesture} from 'react-native-gesture-handler'
+import {Image} from 'expo-image'
+
+import type {Dimensions as ImageDimensions, ImageSource} from '../../@types'
 import useImageDimensions from '../../hooks/useImageDimensions'
 import {
-  createTransform,
-  readTransform,
   applyRounding,
+  createTransform,
   prependPan,
   prependPinch,
   prependTransform,
+  readTransform,
   TransformMatrix,
 } from '../../transforms'
-import type {ImageSource, Dimensions as ImageDimensions} from '../../@types'
 
-const SCREEN = Dimensions.get('window')
 const MIN_DOUBLE_TAP_SCALE = 2
 const MAX_ORIGINAL_IMAGE_ZOOM = 2
 
@@ -56,6 +55,7 @@ const ImageItem = ({
   const pinchTranslation = useSharedValue({x: 0, y: 0})
   const dismissSwipeTranslateY = useSharedValue(0)
   const containerRef = useAnimatedRef()
+  const screen = useWindowDimensions()
 
   // Keep track of when we're entering or leaving scaled rendering.
   // Note: DO NOT move any logic reading animated values outside this function.
@@ -96,7 +96,7 @@ const ImageItem = ({
 
     const dismissDistance = dismissSwipeTranslateY.value
     const dismissProgress = Math.min(
-      Math.abs(dismissDistance) / (SCREEN.height / 2),
+      Math.abs(dismissDistance) / (screen.height / 2),
       1,
     )
     return {
@@ -120,16 +120,21 @@ const ImageItem = ({
     }
     const [nextTranslateX, nextTranslateY, nextScale] =
       readTransform(candidateTransform)
-    const scaledDimensions = getScaledDimensions(imageDimensions, nextScale)
+    const scaledDimensions = getScaledDimensions(
+      imageDimensions,
+      nextScale,
+      screen.width,
+      screen.height,
+    )
     const clampedTranslateX = clampTranslation(
       nextTranslateX,
       scaledDimensions.width,
-      SCREEN.width,
+      screen.width,
     )
     const clampedTranslateY = clampTranslation(
       nextTranslateY,
       scaledDimensions.height,
-      SCREEN.height,
+      screen.height,
     )
     const dx = clampedTranslateX - nextTranslateX
     const dy = clampedTranslateY - nextTranslateY
@@ -139,8 +144,8 @@ const ImageItem = ({
   const pinch = Gesture.Pinch()
     .onStart(e => {
       pinchOrigin.value = {
-        x: e.focalX - SCREEN.width / 2,
-        y: e.focalY - SCREEN.height / 2,
+        x: e.focalX - screen.width / 2,
+        y: e.focalY - screen.height / 2,
       }
     })
     .onChange(e => {
@@ -151,7 +156,7 @@ const ImageItem = ({
       // Also, like in stock Android apps, don't let the user zoom out further than 1:1.
       const [, , committedScale] = readTransform(committedTransform.value)
       const maxCommittedScale =
-        (imageDimensions.width / SCREEN.width) * MAX_ORIGINAL_IMAGE_ZOOM
+        (imageDimensions.width / screen.width) * MAX_ORIGINAL_IMAGE_ZOOM
       const minPinchScale = 1 / committedScale
       const maxPinchScale = maxCommittedScale / committedScale
       const nextPinchScale = Math.min(
@@ -250,7 +255,7 @@ const ImageItem = ({
 
       // Try to zoom in so that we get rid of the black bars (whatever the orientation was).
       const imageAspect = imageDimensions.width / imageDimensions.height
-      const screenAspect = SCREEN.width / SCREEN.height
+      const screenAspect = screen.width / screen.height
       const candidateScale = Math.max(
         imageAspect / screenAspect,
         screenAspect / imageAspect,
@@ -258,15 +263,15 @@ const ImageItem = ({
       )
       // But don't zoom in so close that the picture gets blurry.
       const maxScale =
-        (imageDimensions.width / SCREEN.width) * MAX_ORIGINAL_IMAGE_ZOOM
+        (imageDimensions.width / screen.width) * MAX_ORIGINAL_IMAGE_ZOOM
       const scale = Math.min(candidateScale, maxScale)
 
       // Calculate where we would be if the user pinched into the double tapped point.
       // We won't use this transform directly because it may go out of bounds.
       const candidateTransform = createTransform()
       const origin = {
-        x: e.absoluteX - SCREEN.width / 2,
-        y: e.absoluteY - SCREEN.height / 2,
+        x: e.absoluteX - screen.width / 2,
+        y: e.absoluteY - screen.height / 2,
       }
       prependPinch(candidateTransform, scale, origin, {x: 0, y: 0})
 
@@ -308,8 +313,14 @@ const ImageItem = ({
       )
 
   const isLoading = !isLoaded || !imageDimensions
+
+  const screenSize = useMemo(
+    () => ({width: screen.width, height: screen.height}),
+    [screen.width, screen.height],
+  )
+
   return (
-    <Animated.View ref={containerRef} style={styles.container}>
+    <Animated.View ref={containerRef} style={[styles.container, screenSize]}>
       {isLoading && (
         <ActivityIndicator size="small" color="#FFF" style={styles.loading} />
       )}
@@ -330,8 +341,6 @@ const ImageItem = ({
 
 const styles = StyleSheet.create({
   container: {
-    width: SCREEN.width,
-    height: SCREEN.height,
     overflow: 'hidden',
   },
   image: {
@@ -349,20 +358,22 @@ const styles = StyleSheet.create({
 function getScaledDimensions(
   imageDimensions: ImageDimensions,
   scale: number,
+  screenWidth: number,
+  screenHeight: number,
 ): ImageDimensions {
   'worklet'
   const imageAspect = imageDimensions.width / imageDimensions.height
-  const screenAspect = SCREEN.width / SCREEN.height
+  const screenAspect = screenWidth / screenHeight
   const isLandscape = imageAspect > screenAspect
   if (isLandscape) {
     return {
-      width: scale * SCREEN.width,
-      height: (scale * SCREEN.width) / imageAspect,
+      width: scale * screenWidth,
+      height: (scale * screenWidth) / imageAspect,
     }
   } else {
     return {
-      width: scale * SCREEN.height * imageAspect,
-      height: scale * SCREEN.height,
+      width: scale * screenHeight * imageAspect,
+      height: scale * screenHeight,
     }
   }
 }
diff --git a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.ios.tsx b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.ios.tsx
index 383490f4f1..15611a6a34 100644
--- a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.ios.tsx
+++ b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.ios.tsx
@@ -6,10 +6,9 @@
  *
  */
 
-import React, {useState} from 'react'
-
-import {Dimensions, StyleSheet} from 'react-native'
-import {Image} from 'expo-image'
+import React, {useMemo, useState} from 'react'
+import {useWindowDimensions} from 'react-native'
+import {Gesture, GestureDetector} from 'react-native-gesture-handler'
 import Animated, {
   interpolate,
   runOnJS,
@@ -17,17 +16,15 @@ import Animated, {
   useAnimatedStyle,
   useSharedValue,
 } from 'react-native-reanimated'
+import {Image} from 'expo-image'
+
 import {useAnimatedScrollHandler} from '#/lib/hooks/useAnimatedScrollHandler_FIXED'
-import {Gesture, GestureDetector} from 'react-native-gesture-handler'
-
+import {Dimensions as ImageDimensions, ImageSource} from '../../@types'
 import useImageDimensions from '../../hooks/useImageDimensions'
-
-import {ImageSource, Dimensions as ImageDimensions} from '../../@types'
 import {ImageLoading} from './ImageLoading'
 
 const SWIPE_CLOSE_OFFSET = 75
 const SWIPE_CLOSE_VELOCITY = 1
-const SCREEN = Dimensions.get('screen')
 const MAX_ORIGINAL_IMAGE_ZOOM = 2
 const MIN_DOUBLE_TAP_SCALE = 2
 
@@ -53,9 +50,10 @@ const ImageItem = ({
   const translationY = useSharedValue(0)
   const [loaded, setLoaded] = useState(false)
   const [scaled, setScaled] = useState(false)
+  const screen = useWindowDimensions()
   const imageDimensions = useImageDimensions(imageSrc)
   const maxZoomScale = imageDimensions
-    ? (imageDimensions.width / SCREEN.width) * MAX_ORIGINAL_IMAGE_ZOOM
+    ? (imageDimensions.width / screen.width) * MAX_ORIGINAL_IMAGE_ZOOM
     : 1
 
   const animatedStyle = useAnimatedStyle(() => {
@@ -98,8 +96,8 @@ const ImageItem = ({
     let nextZoomRect = {
       x: 0,
       y: 0,
-      width: SCREEN.width,
-      height: SCREEN.height,
+      width: screen.width,
+      height: screen.height,
     }
 
     const willZoom = !scaled
@@ -108,6 +106,8 @@ const ImageItem = ({
         imageDimensions,
         absoluteX,
         absoluteY,
+        screen.width,
+        screen.height,
       )
     }
 
@@ -131,23 +131,31 @@ const ImageItem = ({
 
   const composedGesture = Gesture.Exclusive(doubleTap, singleTap)
 
+  const screenSize = useMemo(
+    () => ({
+      width: screen.width,
+      height: screen.height,
+    }),
+    [screen.width, screen.height],
+  )
+
   return (
     <GestureDetector gesture={composedGesture}>
       <Animated.ScrollView
         // @ts-ignore Something's up with the types here
         ref={scrollViewRef}
-        style={styles.listItem}
+        style={screenSize}
         pinchGestureEnabled
         showsHorizontalScrollIndicator={false}
         showsVerticalScrollIndicator={false}
         maximumZoomScale={maxZoomScale}
-        contentContainerStyle={styles.imageScrollContainer}
+        contentContainerStyle={{height: screen.height}}
         onScroll={scrollHandler}>
         {(!loaded || !imageDimensions) && <ImageLoading />}
         <AnimatedImage
           contentFit="contain"
           source={{uri: imageSrc.uri}}
-          style={[styles.image, animatedStyle]}
+          style={[screenSize, animatedStyle]}
           accessibilityLabel={imageSrc.alt}
           accessibilityHint=""
           onLoad={() => setLoaded(true)}
@@ -158,24 +166,12 @@ const ImageItem = ({
   )
 }
 
-const styles = StyleSheet.create({
-  imageScrollContainer: {
-    height: SCREEN.height,
-  },
-  listItem: {
-    width: SCREEN.width,
-    height: SCREEN.height,
-  },
-  image: {
-    width: SCREEN.width,
-    height: SCREEN.height,
-  },
-})
-
 const getZoomRectAfterDoubleTap = (
   imageDimensions: ImageDimensions | null,
   touchX: number,
   touchY: number,
+  screenWidth: number,
+  screenHeight: number,
 ): {
   x: number
   y: number
@@ -186,15 +182,15 @@ const getZoomRectAfterDoubleTap = (
     return {
       x: 0,
       y: 0,
-      width: SCREEN.width,
-      height: SCREEN.height,
+      width: screenWidth,
+      height: screenHeight,
     }
   }
 
   // First, let's figure out how much we want to zoom in.
   // We want to try to zoom in at least close enough to get rid of black bars.
   const imageAspect = imageDimensions.width / imageDimensions.height
-  const screenAspect = SCREEN.width / SCREEN.height
+  const screenAspect = screenWidth / screenHeight
   const zoom = Math.max(
     imageAspect / screenAspect,
     screenAspect / imageAspect,
@@ -205,25 +201,25 @@ const getZoomRectAfterDoubleTap = (
 
   // Next, we'll be calculating the rectangle to "zoom into" in screen coordinates.
   // We already know the zoom level, so this gives us the rectangle size.
-  let rectWidth = SCREEN.width / zoom
-  let rectHeight = SCREEN.height / zoom
+  let rectWidth = screenWidth / zoom
+  let rectHeight = screenHeight / zoom
 
   // Before we settle on the zoomed rect, figure out the safe area it has to be inside.
   // We don't want to introduce new black bars or make existing black bars unbalanced.
   let minX = 0
   let minY = 0
-  let maxX = SCREEN.width - rectWidth
-  let maxY = SCREEN.height - rectHeight
+  let maxX = screenWidth - rectWidth
+  let maxY = screenHeight - rectHeight
   if (imageAspect >= screenAspect) {
     // The image has horizontal black bars. Exclude them from the safe area.
-    const renderedHeight = SCREEN.width / imageAspect
-    const horizontalBarHeight = (SCREEN.height - renderedHeight) / 2
+    const renderedHeight = screenWidth / imageAspect
+    const horizontalBarHeight = (screenHeight - renderedHeight) / 2
     minY += horizontalBarHeight
     maxY -= horizontalBarHeight
   } else {
     // The image has vertical black bars. Exclude them from the safe area.
-    const renderedWidth = SCREEN.height * imageAspect
-    const verticalBarWidth = (SCREEN.width - renderedWidth) / 2
+    const renderedWidth = screenHeight * imageAspect
+    const verticalBarWidth = (screenWidth - renderedWidth) / 2
     minX += verticalBarWidth
     maxX -= verticalBarWidth
   }
@@ -238,7 +234,7 @@ const getZoomRectAfterDoubleTap = (
     rectX = Math.max(rectX, minX)
   } else {
     // Keep the rect centered on the screen so that black bars are balanced.
-    rectX = SCREEN.width / 2 - rectWidth / 2
+    rectX = screenWidth / 2 - rectWidth / 2
   }
   let rectY
   if (maxY >= minY) {
@@ -249,7 +245,7 @@ const getZoomRectAfterDoubleTap = (
     rectY = Math.max(rectY, minY)
   } else {
     // Keep the rect centered on the screen so that black bars are balanced.
-    rectY = SCREEN.height / 2 - rectHeight / 2
+    rectY = screenHeight / 2 - rectHeight / 2
   }
 
   return {
diff --git a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.tsx b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.tsx
index 08b99bf9ee..4cb7903efa 100644
--- a/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.tsx
+++ b/src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.tsx
@@ -2,6 +2,7 @@
 
 import React from 'react'
 import {View} from 'react-native'
+
 import {ImageSource} from '../../@types'
 
 type Props = {
diff --git a/src/view/com/lightbox/ImageViewing/index.tsx b/src/view/com/lightbox/ImageViewing/index.tsx
index ff8fdb86d3..48289183cc 100644
--- a/src/view/com/lightbox/ImageViewing/index.tsx
+++ b/src/view/com/lightbox/ImageViewing/index.tsx
@@ -9,15 +9,14 @@
 // https://github.com/jobtoday/react-native-image-viewing
 
 import React, {ComponentType, useCallback, useMemo, useState} from 'react'
-import {StyleSheet, View, Platform} from 'react-native'
-
-import ImageItem from './components/ImageItem/ImageItem'
-import ImageDefaultHeader from './components/ImageDefaultHeader'
-
-import {ImageSource} from './@types'
+import {Platform, StyleSheet, View} from 'react-native'
+import PagerView from 'react-native-pager-view'
 import Animated, {useAnimatedStyle, withSpring} from 'react-native-reanimated'
 import {Edge, SafeAreaView} from 'react-native-safe-area-context'
-import PagerView from 'react-native-pager-view'
+
+import {ImageSource} from './@types'
+import ImageDefaultHeader from './components/ImageDefaultHeader'
+import ImageItem from './components/ImageItem/ImageItem'
 
 type Props = {
   images: ImageSource[]
@@ -88,11 +87,11 @@ function ImageViewing({
 
   return (
     <SafeAreaView
-      style={styles.screen}
+      style={[styles.screen, {backgroundColor}]}
       edges={edges}
       aria-modal
       accessibilityViewIsModal>
-      <View style={[styles.container, {backgroundColor}]}>
+      <View style={styles.container}>
         <Animated.View style={[styles.header, animatedHeaderStyle]}>
           {typeof HeaderComponent !== 'undefined' ? (
             React.createElement(HeaderComponent, {
diff --git a/src/view/com/lightbox/Lightbox.tsx b/src/view/com/lightbox/Lightbox.tsx
index 5bab643ca8..16b49c90b2 100644
--- a/src/view/com/lightbox/Lightbox.tsx
+++ b/src/view/com/lightbox/Lightbox.tsx
@@ -1,22 +1,24 @@
-import React from 'react'
+import React, {useEffect} from 'react'
 import {LayoutAnimation, StyleSheet, View} from 'react-native'
-import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
-import ImageView from './ImageViewing'
-import {shareImageModal, saveImageToMediaLibrary} from 'lib/media/manip'
-import * as Toast from '../util/Toast'
-import {Text} from '../util/text/Text'
-import {s, colors} from 'lib/styles'
-import {Button} from '../util/forms/Button'
-import {isIOS} from 'platform/detection'
 import * as MediaLibrary from 'expo-media-library'
+import * as ScreenOrientation from 'expo-screen-orientation'
+import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
+import {msg, Trans} from '@lingui/macro'
+import {useLingui} from '@lingui/react'
+
 import {
+  ImagesLightbox,
+  ProfileImageLightbox,
   useLightbox,
   useLightboxControls,
-  ProfileImageLightbox,
-  ImagesLightbox,
 } from '#/state/lightbox'
-import {Trans, msg} from '@lingui/macro'
-import {useLingui} from '@lingui/react'
+import {saveImageToMediaLibrary, shareImageModal} from 'lib/media/manip'
+import {colors, s} from 'lib/styles'
+import {isIOS} from 'platform/detection'
+import {Button} from '../util/forms/Button'
+import {Text} from '../util/text/Text'
+import * as Toast from '../util/Toast'
+import ImageView from './ImageViewing'
 
 export function Lightbox() {
   const {activeLightbox} = useLightbox()
@@ -25,6 +27,19 @@ export function Lightbox() {
     closeLightbox()
   }, [closeLightbox])
 
+  const isOpen = !!activeLightbox
+
+  useEffect(() => {
+    if (isOpen) {
+      ScreenOrientation.unlockAsync()
+    } else {
+      ScreenOrientation.lockAsync(ScreenOrientation.OrientationLock.PORTRAIT_UP)
+    }
+    return () => {
+      ScreenOrientation.lockAsync(ScreenOrientation.OrientationLock.PORTRAIT_UP)
+    }
+  }, [isOpen])
+
   if (!activeLightbox) {
     return null
   } else if (activeLightbox.name === 'profile-image') {
diff --git a/yarn.lock b/yarn.lock
index d048bdf7fe..2c57fd4798 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11994,6 +11994,11 @@ expo-pwa@0.0.127:
     commander "2.20.0"
     update-check "1.5.3"
 
+expo-screen-orientation@^6.4.1:
+  version "6.4.1"
+  resolved "https://registry.yarnpkg.com/expo-screen-orientation/-/expo-screen-orientation-6.4.1.tgz#1c4428a058921e48b5caa45367e626b8bec10e24"
+  integrity sha512-VM0C9ORNL1aT6Dr2OUeryzV519n0FjtXI2m+HlijOMi1QT2bPg4tBkCd7HLgywU4dZ1Esa46ewUudmk+fOqmMQ==
+
 expo-sharing@^11.10.0:
   version "11.10.0"
   resolved "https://registry.yarnpkg.com/expo-sharing/-/expo-sharing-11.10.0.tgz#0e85197ee4d2634b00fe201e571fbdc64cf83eef"